Liquid-dispensing apparatus



Nov. 17, 1925- 1,561,655

v G. w. MMKENZIE LIQUID DISPENSING APPARATUS Filed May 22, 1924 mm m") Patented Nov. 17, 1925,

UNITED STATES GEORGE W. MACKENZIE, OF BEAVER, PENNSYLVANIA.

LIQUID-DISPEESING APPARATUS.

Application filed May 22, 1924.

To all whom it may concern:

Be it known that I, GEORGE W'. MACKEN- ZIE, residing at Beaver, in the county of Beaver and State of Penns lvania a citizen of the United States, have inventedor discovered certain new and useful Improvements in Liquid-Dispensing Apparatus, of which improvements the following is a specification.

My application relates to improven'ieuts in liquid-dispensing apparatus, and speclfically, to improvements in apparatus possessing the general characteristics ot that shown and described in an application for Letters Patent of the United. States, filed by me November 16, 1923, Serial No. 675,127. The object of the present improvements is simplification of structure,

with consequent economy and better serviceability.

My invention is illustrated in the accompanying drawing, which shows in vertical and medial section apparatus which embodies it. i

In my prior application alluded to above,

I show and describe a vertically standing casing, provided above and below with inlet and outlet taps, and divided interiorly by a horizontally extending web into an upper inlet chamber and a lower outlet chamber. In the dividing web is an orilice and above the orifice is a vertically 0scillatory weightless valve the valve being more or less completely rendered ineffective by a sustaining spring. I describe in the specification of that prior application that, having provided such a structure, the provision of a liquid supply entering the inlet chamber under head will effect oscillation. of the valve, and a consequent delivery to the outlet chamber of a succession of units of liquid, segre gated by the oscillations of the valve from the constantly entering stream. My further invention as disclosed in the prior ap plication is found in specific means for establishing uniformity in the volume of the units successively delivered to the outlet chamber. My resent invention lies in alternative specihcmeans for achieving this same end,the end, namely, that with each the weight of Serial No. 715,089.

oscillation of the valve a unit volume of invariable value will be segregated and delivered to the outletchamber. Incidentally I have simplified the form and struc- F1 ture of certain accessory mechanical features.

I have found, and heroin lies the essence oi? my invention, that if the stream of liquid which enters and fills the inlet chamber be maintained under a constant head, it is unnecessary to provide the elaborationot valve structures disclosed in my earlier application, but that a single valve member oscillatory above the orifice in the dividing web will under such conditions effect, without any other or additional mechanical parts, the desired end.

Referring to the drawings, the essentially cylindrical and vertically standing casing l is shown, carried by the pipes connected to it, and such support may, and ordinarily will, be adequate and su'lficient. Other means of support are not, however, precluded.

The casing 1 is provided above and below with inlet and outlet taps 2 and 3, and is shown in the drawings to be by these means connected through an inlet pipe 31 with a source of supply and through an outlet'pipe 32 to the desired place of dis charge. Ordinarily the outlet pipe will take the form of the flexible delivery hose, familiar at automobile service stations.

The casing 1 is divided internally by a horizontally extending web 11 into inlet and outlet chambers 4 and 5. Through the web opens a central circular orifice (5, and the rim of this orifice forms the seat for the valve 13 which is mounted to reciprocate vertically within chamber l, to and from its said seat The dividing web 11 within casing 'l may be particularly shaped as the drawing shows. It is the lower head of a cylindri cal casing 10 which depends from the upper head of casing 1. The casing 10 then forms a smaller cylindrical chamber within the cylindrical chamber formed by easing 1, and this'smaller inner chamber is the inlet chamber.

l The means for blanketing and for eliminating mechanically the weight of valve 13 may be such as the builder prefers. I here show means which are specifically different from the means shown and described in my earlier application. The valve 13 is borne on a downwardly extending stem 33, reciprocable in suitable guides formed in a spider 34 carried by and arranged beneath the cylinder 10. It will of course be understood that this spider is a mere skeleton structure, to carry the valve-stem guides, and is no appreciable obstruction to the discharge of liquid through chamber 5 from orifice 6 to outlet pipe 32.

Beneath spider 34 the valve stem carries a bearing plate 35. Adjacent the lower end of the valve stem and within chamber 5 a beam 36 is pivoted to swing in vertical plane. One arm of this beam carries a weight 37, the other carries a roller through which the beam makes hearing from beneath upon the bearing plate 35 of the valve stem. Inspection of the drawing will show the arrangement of these parts to be effective to bring the weight of the valve into counterpoise with weight 37, and so substantially to eliminate from the problem of operation the weight of valve 13.

I have discovered that it the stream of liquid which flowing through pipe 31 enters and fills the inlet chamber be maintained under constant head, the relatively weight less valve 13, being once raised, will under the impulse of the flowing stream oscillate vertically, alternately descending to and re bounding from its seat, and that the volumes of liquid delivered with successive reciprocations through orifice 6 will be uniform. Thus, without more I have an adequate measuring apparatus.

Means suitable for insuring constant head for the entering stream are shown in the drawing. A tank 38 -is in direct and free communication through inlet pipe 31 to the inlet chamber 1. Liquid enters tank 38 from a suitable supply pipe beneath a float controlled valve 39. The vertical position of the float d0 within tank 38 is determined by the depth of the body of liquid accumulated in the tank, and the valve 39 tends to open and close in response to the tendency of the float to sink and rise. These means for maintaining constant head are well known, and need no more minute description. Stljffice it to say that liquid is thus maintained at constant depth within tank 38, and the stream of liquid enters chamber at under constanthead,*the condition which, as I- have said, assures mammary in the volume of liquid delivered oneach reciprocation of valve 1-3.

Inlet chamber a is constantly full, or sub stantially run-er liquid. When va1've1 3 rises the stream flows, when the valve is seated new is cut-0a. The force with which the dc scending valve is carried to its seat causes it to rebound and open again. Thus, as long as the conditions described continue the valve will oscillate and the pulsating delivcry of liquid will continue.

It will be apparent that in the operation described, with each successive seating of the valve the walls of inlet chamber and of the conduit 31 opening to the inlet chamber will be subject to pulsations of pressure,to water-hammer. I take advantage of this water-hammer to operate recording means. Specifically, as here shown I introduce at a suitable point in the walls subject to such pulsation of pressure a sylphon tube 41, closed at the outer end but at the inner end in open communication with the water passageway. I place this sylphon tube under the tension oia spring 42, tending always to collapse it, and I mount on the closed outer end of the sylphon tube 4-1 a rod 43 which I interlink with a crank-arm 4:4 borne by the driving shaft 45 of a tally 4:6. It is manifest that as valve 13 reciprocat'es, sylphon tube d1 will expand and collapse, and that the tally will through the instrumen tality describes operate in response to this movement.

I provide the beam 36 with an integral axle, and I prolong this axle through. the w: ll of casing 1, and externally of 1 I provide the axle with a crank, indicated in dotted lines at 47. I have already said that, valve 13 being once unseated, the flowing stream will set up and having set up will maintain indefinitely the describedv automatic oscillation of valve 13. This is the condition which obtains, so long as delivery of liquid is desired. "When delivery is to cease, the attendant taking hold upon crank 4-7 stops oscillation and arrests valve 13 in seated position. When this has been done, when the recoil of the valve in coming to its seat has so been overcome and rendered ineffective, the valve will remain on its seat and the attendant may then let go the crank. Thereafter the apparatus will continue inactive. When delivery is to be again effected, the attendant takes the crank again and, turning it, unseats valve 13, and then immediately releases the crank. The valve- 13 being unseatcd flow recommences, and valve oscillation is resumed. and the pulsatmg delivery continues until again the at tendant exerts his control and stops valve oscillation, in the manner already described.

Thus delivery is started and stopped. Meanwhile the tally apparatus, operated as described, makes record of the volume of liquid delivered.

The apparatus is intended primarily as gasoliiiewe'ncling apparatus, but manifestly it is not necessarily limited in its use to liquid ofa'ny particularcharacter nor to delivery under anyparticular circumstances I claim as my invention: valve and tending constantly to sustain it at In liquid-dispensing apparatus the coman interval above said orifice, and means for bination of a liquid container provided With maintaining a constant head upon a body of 10 a bottom orifice, a vertically reciprocable Water filling said container. vawe arranged above said orifice and In testimony whereof I have hereunto set adapt-ed on descent to effect closure thereof, my hand. yielding means constantly exerted upon said GEORGE \V. MAoKENZIE. 

